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authorTejun Heo <tj@kernel.org>2011-11-21 12:32:23 -0800
committerTejun Heo <tj@kernel.org>2011-11-21 12:32:23 -0800
commita585042f7b933539a0b6bc63650c2d49ffb2e55d (patch)
treebb93d05050e04c4bcd53fdf535239e6312fb62e2 /kernel/power/process.c
parenta5be2d0d1a8746e7be5210e3d6b904455000443c (diff)
downloadlinux-a585042f7b933539a0b6bc63650c2d49ffb2e55d.tar.bz2
freezer: remove racy clear_freeze_flag() and set PF_NOFREEZE on dead tasks
clear_freeze_flag() in exit_mm() is racy. Freezing can start afterwards. Remove it. Skipping freezer for exiting task will be properly implemented later. Also, freezable() was testing exit_state directly to make system freezer ignore dead tasks. Let the exiting task set PF_NOFREEZE after entering TASK_DEAD instead. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Oleg Nesterov <oleg@redhat.com>
Diffstat (limited to 'kernel/power/process.c')
-rw-r--r--kernel/power/process.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/power/process.c b/kernel/power/process.c
index fe2787207f00..23822dc14b6c 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -25,8 +25,7 @@
static inline int freezable(struct task_struct * p)
{
if ((p == current) ||
- (p->flags & PF_NOFREEZE) ||
- (p->exit_state != 0))
+ (p->flags & PF_NOFREEZE))
return 0;
return 1;
}